[PATCH v12 0/4] remove use of RTE_MARKER fields in libraries

[David Marchand]

As per techboard meeting 2024/03/20 adopt hybrid proposal of adapting
descriptor fields and removing cachline fields.

RTE_MARKER typedefs are a GCC extension unsupported by MSVC. Remove
RTE_MARKER fields.

For cacheline{0,1} fields remove fields entirely and use inline
functions to prefetch.

Provide new rearm_data and rx_descriptor_fields1 fields in anonymous
unions as single element arrays of with types matching the original
markers to maintain API compatibility.

Note: diff is easier viewed with -b due to additional nesting from
      unions / structs that have been introduced.

v12:
  * rebased,
  * did some cosmetic changes,
  * and resending to double check CI (v11 had an issue in UNH Debian
    containers),

v11:
  * correct doxygen comment style for field documentation.

v10:
  * move removal notices in in release notes from 24.03 to 24.07.

v9:
  * provide narrowest possible libabigail.abignore to suppress
    removal of fields that were agreed are not actual abi changes.

v8:
  * rx_descriptor_fields1 array is now constexpr sized to
    24 / sizeof(void *) so that the array encompasses fields
    accessed via the array.
  * add a comment to rx_descriptor_fields1 array site noting
    that void * type of elements is retained for compatibility
    with existing drivers.
  * clean up comments of fields in rte_mbuf to be before the
    field they apply to instead of after.
  * duplicate alignas(RTE_CACHE_LINE_MIN_SIZE) into both legs of
    conditional compile for first field of cacheline 1 instead of
    once before conditional compile block.

v7:
  * complete re-write of series, previous versions not noted. all
    reviewed-by and acked-by tags (if any) were removed.

-- 
David Marchand


Tyler Retzlaff (4):
  net/i40e: use mbuf prefetch helper
  mbuf: remove marker fields
  security: remove marker fields
  cryptodev: remove marker fields

 devtools/libabigail.abignore            |   6 +
 doc/guides/rel_notes/release_24_07.rst  |   3 +
 drivers/net/i40e/i40e_rxtx_vec_avx512.c |   2 +-
 lib/cryptodev/cryptodev_pmd.h           |   3 +-
 lib/mbuf/rte_mbuf.h                     |   4 +-
 lib/mbuf/rte_mbuf_core.h                | 188 ++++++++++++------------
 lib/security/rte_security_driver.h      |   3 +-
 7 files changed, 112 insertions(+), 97 deletions(-)

-- 
2.45.1